Excuse me, what is the material of hand-tied sandbags? Good iron sand steel plate or lead block?

It is best to use lead blocks for leggings. If you tie your hands, you can use iron sand bags, lead blocks or steel bracelets. If you practice boxing, I suggest you use steel bracelets, because the weight of handbags tied with iron sand bags is not ideal. Lead blocks are not easy to buy now. Steel bracelets can be bought online. The weight of leggings can be increased or decreased according to your own requirements. These are all strength training. You just need to set your own training amount and weight. No other skills.